In case you've invested in one of those fancy Raspberry Pi units, here are a few of really cool alternative uses for the device... more than just the cheap toy that many have used it for...
Make a MAME-based Arcade Cabinet!
Some cool dude figured out that he could take the Raspberry Pi and reconfigure it to be a really sweet arcade cabinet... sure is a lot easier to maintain than an original cabinet from the 70s and 80s.
CHECK IT OUT: http://www.raspberrypi.org/archives/2412
Make a Low-Cost Security Camera!
Don't trust your neighbors? Not enough money for a high-end security unit? Why not use the Raspberry Pi to solve all of your problems?
CHECK IT OUT: http://www.raspberrypi.org/archives/5071
Build a SuperComputer!!!
Feeling super? Make a SUPERcomputer! One dude did it- so can you.